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A rare heterochromatic variant of chromosome 4.
  1. Z Docherty,
  2. S M Bowser-Riley


    A variant chromosome 4 with a large G positive heterochromatic block is described and discussed in relation to chromosome 4 heteromorphisms observed with other banding techniques. The extra heterochromatin is C positive and fluoresces brilliantly with Q banding, but differs from Yqh with some methods of staining.

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